[Mlir-commits] [mlir] [mlir][mesh] Fix empty `split_axes` sharding annotation (PR #108236)

[Boian Petkantchin]

https://github.com/sogartar approved this pull request.

This change is consistent with the [doc](https://github.com/llvm/llvm-project/blob/9886788a8a500a1b429a6db64397c849b112251c/mlir/include/mlir/Dialect/Mesh/IR/MeshOps.td#L216-L219).
I can see why it is annoying and error prone that every usage of the attribute must check first if there are any subarrays in the array, but requiring the existence of the single empty subarray looks like a quirk.

https://github.com/llvm/llvm-project/pull/108236